Supplemental Guarantor Information (Narrative) (Details)	3 Months Ended
Feb. 28, 2015
Guarantees [Abstract]
Ownership share in guarantor subsidiaries (percent)	100.00%
Line of credit facility, significant subsidiary threshold, percent	5.00%
Line of credit facility, non guarantor subsidiary threshold, percent	10.00%

Line of Credit Facility, Non Guarantor Subsidiary Threshold, Percent

No definition available.

Name:	kbh_LineofCreditFacilityNonGuarantorSubsidiaryThresholdPercent
Namespace Prefix:	kbh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration